First of all CFL stands for Compact Fluorescent Light. There are many different types of CFL lightbulbs. To save more, here are a few purchasing tips to help you buy the right CFLs for your home.

Place ENERGY STAR qualified CFLs in the fixtures you use most frequently. CFLs are most efficient when they operate for several hours at a time (2 hours or more).

Certain CFLs are designed to work in dimmable, 3-way fixtures, as well as torchieres. Check the package to be sure you are buying the correct bulb.

Use ENERGY STAR qualified CFLs in the fixtures that are hard to reach such as ceiling fans, other ceiling fixtures, and enclosed outdoor fixtures. Because CFLs last longer, you enjoy the convenience of buying and changing bulbs less frequently.

ENERGY STAR qualified CFLs come in a multitude of shapes and sizes. Select the best shape and size to fit your needs:

Bare, Mini-spirals, Spirals

Bare, Double, Triple, and Quadruple tubes

Circle-line

Covered A-line

Covered Globe

Covered Bullet or Torpedo

Smaller sizes mean greater compatibility with your fixtures. Today’s ENERGY STAR qualified CFLs are designed to be smaller and thinner than earlier models, so you can install them in a wider variety of fixtures, such as wall sconces, ceiling-mounted fixtures, and ceiling fans.

Qualified CFLs are available in a range of color temperatures:

Warm, white light: Look for a color temperature of 2,700–3,000K.

Cooler, white light: Look for a color temperature of 4,500–6,000K.

You should also check the lumen rating to find the right CFL. The higher the lumen rating, the greater the light output. Consult the following chart to determine what CFL wattage is best to replace your incandescent light bulb: